Dota 2 Beta Keys [Updated]

GosuGamers notes that Valve has quietly removed the requirement of a beta
key for Dota 2, though this is not the case for those playing the MOBA
game in China. Sure enough, checking on the game's listing on Steam included the
message: "You already own Dota 2." Thanks
Videogamer. Update: Apparently there was confusion here with spectator mode, and keys are still required to play the game. Apologies for the error.